Join Pax as a Senior Software Engineer to build the operating system for global trade compliance. You will own major product areas end-to-end, developing AI-powered workflows and high-stakes financial data models. Working directly with founders and enterprise customers, you’ll tackle a $10B opportunity by transforming complex regulations into simple, reliable software solutions.
Senior Software Engineer at Pax
Join Pax, a YC S24 AI control tower disrupting the $10B tariff refund industry. As a Senior Software Engineer in San Francisco, you'll own major product areas end-to-end, building AI-powered workflows and high-stakes financial systems. This is a unique opportunity to shape the engineering culture of a fast-moving team while solving massive, real-world problems in global trade compliance.
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Location
San Francisco, United States
Compensation
$175k-$220k + Equity
Company
Pax
Role overview
Pax AI is a trade compliance and duty drawback software company that provides an AI-powered “control tower” platform for global trade compliance and tariff refunds. Its platform unifies import and export data, identifies all eligible customs duty, tariff, and fee refunds (duty drawback), and automates the preparation and electronic filing of compliant claims with U.S. Customs and Border Protection. Pax AI is positioned as an intelligence layer for trade compliance operations, using purpose-built AI to operate like a world-class compliance expert, recover every eligible dollar, and increase productivity and accuracy for importers of all sizes. The company focuses on modern, end-to-end duty drawback services and software, offering a TurboTax-like experience that turns complex customs regulations into algorithms so businesses can easily reclaim money that is rightfully theirs.
What you will do
- Design and implement durable APIs, data models, and AI-powered workflows that reconcile tens of millions of dollars in annual trade volume.
- Build across the full stack using React, Next.js, and FastAPI to create polished customer-facing interfaces and robust backend data pipelines.
- Collaborate directly with enterprise customers to translate ambiguous operational challenges and federal trade regulations into precise, actionable technical decisions.
Who this is a fit for
- Has a strong record of building and shipping meaningful software at high-growth startups or other demanding technical environments.
- Possesses full-stack proficiency with modern technologies including React, Next.js, and Python-based frameworks like FastAPI or SQLModel.
- Demonstrates a pragmatic approach to building with LLMs, understanding their reliability limitations while leveraging them to transform messy trade data into structured records.
Why this role is remarkable
- Join a high-impact YC S24 startup founded by supply chain experts from MIT, Flexport, and Amazon with $4.5M in seed funding.
- Solve technically demanding problems in a 200-year-old industry where 80% of eligible import tax refunds—roughly $11B annually—currently go unclaimed.
- Own entire product domains from technical design to launch, directly influencing the engineering culture and architectural direction of a growing AI-first company.
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and Pax wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.